<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
    <script src="https://unpkg.com/vue"></script>
    <script>
        window.onload=function(){
           /* var c=new Vue({
                el:'#a',
                data:{
                    msg:'Hello vue'
                }
            });
            <div id="a">
            {{msg}}
            </div>
            */
            var app2 = new Vue({
                el: '#app-2',
                data: {
                    message: '页面加载于 ' + new Date().toLocaleString()
                }
            })
        };
    </script>
</head>
<body>
<div id="app-2">
  <span v-bind:title="message">
    鼠标悬停几秒钟查看此处动态绑定的提示信息！
  </span>
</div>
</body>
</html>